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TopNMetricSpec

The topN metric spec specifies how topN values should be sorted.

Numeric TopNMetricSpec

The simplest metric specification is a String value indicating the metric to sort topN results by. They are included in a topN query with:

"metric": "<metric_name>"

The metric field can also be given as a JSON object. The grammar for dimension values sorted by numeric value is shown below:

"metric": {
    "type": "numeric",
    "metric": "<metric_name>"
}

property	description	required?
type	this indicates a numeric sort	yes
metric	the actual metric field in which results will be sorted by	yes

Lexicographic TopNMetricSpec

The grammar for dimension values sorted lexicographically is as follows:

"metric": {
    "type": "lexicographic",
    "previousStop": "<previousStop_value>"
}

property	description	required?
type	this indicates a lexicographic sort	yes
previousStop	the starting point of the lexicographic sort. For example, if a previousStop value is 'b', all values before 'b' are discarded. This field can be used to paginate through all the dimension values.	no

AlphaNumeric TopNMetricSpec

Sort dimension values in alpha-numeric order, i.e treating numbers differently from other characters in sorting the values. The algorithm is based on https://github.com/amjjd/java-alphanum.

"metric": {
    "type": "alphaNumeric",
    "previousStop": "<previousStop_value>"
}

property	description	required?
type	this indicates an alpha-numeric sort	yes
previousStop	the starting point of the alpha-numeric sort. For example, if a previousStop value is 'b', all values before 'b' are discarded. This field can be used to paginate through all the dimension values.	no

Inverted TopNMetricSpec

Sort dimension values in inverted order, i.e inverts the order of the delegate metric spec. It can be used to sort the values in descending order.

"metric": {
    "type": "inverted",
    "metric": <delegate_top_n_metric_spec>
}

property	description	required?
type	this indicates an inverted sort	yes
metric	the delegate metric spec.	yes

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